Journal ArticleDOI
QoS issues in Web services
TLDR
QoS measures can include the maximum throughput or a function that describes how throughput varies with load intensity, which can be measured in terms of arrival rates (such as requests per second) or number of concurrent requests.Abstract:
Quality of service (QoS) is a combination of several qualities or properties of a service, such as: availability is the percentage of time that a service is operating; security properties include the existence and type of authentication mechanisms the service offers, confidentiality and data integrity of messages exchanged, nonrepudiation of requests or messages, and resilience to denial-of-service attacks; response time is the time a service takes to respond to various types of requests; Response time is a function of load intensity, which can be measured in terms of arrival rates (such as requests per second) or number of concurrent requests. QoS takes into account not only the average response time, but also the percentile of the response time; and throughput is the rate at which a service can process requests. QoS measures can include the maximum throughput or a function that describes how throughput varies with load intensity. The QoS measure is observed by Web services users. These users are not human beings but programs that send requests for services to Web service providers. QoS issues in Web services have to be evaluated from the perspective of the providers of Web services and from the perspective of the users of these services.read more
Citations
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Proceedings ArticleDOI
A QoS-aware Computation Model for Dynamic Web Service Selection
TL;DR: This paper has presented a QoS-based computation model for web service selection through improving the previous normalization algorithm by which the same QoS value may be gained for different services.
Journal ArticleDOI
Evolving Artificial Neural Networks Using Simulated Annealing-based Hybrid Genetic Algorithms
Huawang Shi,Wanqing Li +1 more
TL;DR: In this paper, a hybrid genetic algorithm (HGA) was proposed to solve the problem of finding the optimal solution in large and small scale problems, and the proposed HGA incorporates simulated annealing into a basic GA that enables the algorithm to perform genetic search over the subspace of local optima.
Dissertation
Bringing Instruments to a Service-Oriented Interactive Grid
TL;DR: This thesis describes in detail the proposed software architecture of the IE and proposes a set of solution that improves the performances of a SOA System, in terms of both throughput and latency of service invocations, in order to fulfill the Quality of Service (QoS) nonfunctional requirement.
Proceedings ArticleDOI
Integration of Embedded Devices Through Web Services: Requirements, Challenges and Early Results
TL;DR: The goal in this paper is to investigate the adequacy of Web Services for the integration of the numerous devices found in a manufacturing cell in order to make these devices more easily reconfigurable and able to adapt themselves to changes in the production environment.
Proceedings ArticleDOI
Managing service performance in NoSQL distributed storage systems
TL;DR: The architecture of a quality-of-service (QoS) infrastructure for achieving controlled application performance over NoSQL distributed storage systems is described and results from a preliminary evaluation using the Yahoo Cloud Serving Benchmark are provided.
References
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Journal ArticleDOI
Unraveling the Web services web: an introduction to SOAP, WSDL, and UDDI
Francisco Curbera,Matthew J. Duftler,Rania Khalaf,William A. Nagy,Nirmal K. Mukhi,Sanjiva Weerawarana +5 more
TL;DR: This tutorial explores the most salient and stable specifications in each of the three major areas of the emerging Web services framework, which are the simple object access protocol, the Web Services Description Language and the Universal Description, Discovery, and Integration directory.
Journal ArticleDOI
Session-based admission control: a mechanism for peak load management of commercial Web sites
Ludmila Cherkasova,P. Phaal +1 more
TL;DR: It is shown that a Web server augmented with the admission control mechanism is able to provide a fair guarantee of completion, for any accepted session, independent of a session length, which is a critical requirement for any e-business.